If she leaves her hubby after getting her FLR(M), she can only stay in UK until the validity of FLR(M) expires or until UKBA cancels it if her hubby would report her. She can't apply ILR as she needs to be living with her husband to get that. Go to this site http://www.ukba.homeoffice.gov.uk/vi...tionship-ends/ to read about what would happen if the relationship ends.
If this would happen to me personally, and the relationship can't be fixed, I would rather go back to be with my family in the Philippines, where I can be with the people who can protect and support me. It's not worth staying here all by yourself struggling. That's just me. I don't know about the others.